MARPOL Annex IV
The international convention rule on prevention of pollution by sewage from ships.
IMO Resolution MEPC.227(64)
The performance standard for marine sewage treatment plants (effluent quality for certified discharge).
IMO Resolution MEPC.157(55)
The approved discharge-rate standard for untreated/comminuted sewage at distance from land.
USCG Marine Sanitation Device (MSD), 33 CFR 159
The US/Caribbean certification standard (Type II for treated discharge).





